Heya, I'm not very good at description so I'll try my best.
After attempting to play through the game in its current state with a friend of mine, we came across a few issues with the co-op functionality. We are not entirely sure if these are bugs or gameplay choices, or really if we were just going about things wrong but we came across a few situations that we felt probably should not have occurred.
One such instance that describes the sort of stuff we were encountering was where we had just entered the second camp (not the Fort Joy Ghetto but the one with the seekers I believe it was); there were 3 injured fellows on the ground; I spoke to the lady attending them and said we could try healing them, but since I wasn't the healer of the group I gave the task to my friend. My friend healed all three of them with restoration but when I talked to her again she just mentioned that "A stranger had come and saved them". As if my friend had not been directly next to me and in my party, or as if he had not gotten her request to heal them either.
Another such instance was with the retrieval of Lord Withermoores soul. My friend had spoken to and freed him and got the quest to go and find his soul. We found his soul jar and I tucked it away into my inventory. We returned to him and I spoke to him, saying I had his soul jar. I smashed it for him and wound up getting no EXP; meanwhile my friend who was standing next to me and his party got EXP for completing the quest, as though only he had actually taken it, despite us being in the same place at the same time and even listening to each other's convos.
A final example was one where I had recruited an NPC to work for the party, then gave him to my friend to control. It wound up with neither of us being able to talk to him because, I was the one who recruited him but he was the one in control of them.
There were other smaller instances of this sort of discrepancy where something one of us initiated could not be completed by the other, as though the game was having us both play through the game separately from one another despite sharing the same finite world space. I believe this may have something to do with the "making war" and new multiplayer competitiveness that was pushed out in the last update.
I was sort of wondering if when the full game is released, that it would be possible to be able to restore the sort of CO-OP that went on in the first game where if one person starts a quest, everyones' logs are updated and anyone can complete that quest and speak to NPCS as though they had been the one to talk first (or at least acknowledge that they are in the same party and therefore the same group). If you say, wanted to do an actual non competitive playthrough together. Or if this was just a series of bugs or unfinished gameplay.
Anyways those are my thoughts so far, great game otherwise! Really enjoying it.